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Note 8 - Long-term Obligations (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended 24 Months Ended
Jun. 28, 2019
Jan. 15, 2019
May 01, 2018
Jun. 24, 2017
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2023
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2023
Jun. 30, 2020
Jun. 30, 2022
Dec. 31, 2018
Jun. 14, 2017
Repayments of Long-term Debt, Total               $ 171,768 $ 20,506          
Gain (Loss) on Extinguishment of Debt, Total         $ (31)   (2,830)          
Interest Rate Swap [Member]                            
Derivative, Final Notional Amount $ 67,500 $ 90,000                       $ 90,000
Derivative, Fixed Interest Rate 6.1735% 6.49425%                       6.49425%
Derivative, Maturity Date Jun. 30, 2022     Jun. 28, 2019                    
London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swap [Member]                            
Derivative, Basis Spread on Variable Rate 4.50% 5.00%                       5.00%
The 2019 Senior Credit Facility [Member]                            
Debt Instrument, Unamortized Discount, Total         2,585     2,585          
Debt Issuance Costs, Gross   $ 2,684                        
Debt Agreement, Alternate Base Rate, Percentage Lower Than LIBOR Margin   1.00%                        
Debt Instrument Covenants, Minimum Borrowing         90,000     $ 90,000            
Weighted Average Life of Senior Credit Facility               2 years            
The 2019 Senior Credit Facility [Member] | Forecast [Member]                            
Long-term Debt, Maturities, Repayments of Principal, Percentage Per Quarter             2.50%     1.875% 0.625% 1.25%    
The 2019 Senior Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]                            
Debt Instrument, Basis Spread on Variable Rate   4.50%                        
The 2019 Senior Credit Facility [Member] | Initial Term A Facility [Member]                            
Debt Instrument, Face Amount   $ 180,000                        
The 2019 Senior Credit Facility [Member] | Revolving Credit Facility [Member]                            
Line of Credit Facility, Maximum Borrowing Capacity   20,000                        
Long-term Line of Credit, Total         0     $ 0            
The 2019 Senior Credit Facility [Member] | Delayed-Draw Term A Facility [Member]                            
Debt Agreement, Maximum Borrowing Capacity   25,000                        
Long-term Line of Credit, Total         0     0            
The 2019 Senior Credit Facility [Member] | Incremental Term A Loans [Member]                            
Debt Agreement, Minimum Incremental Borrowing Capacity   60,000                        
Proceeds from Issuance of Long-term Debt, Net of Discounts   178,335                        
Debt Instrument, Unamortized Discount, Total   1,665                        
Long-term Debt, Gross         0     0            
The 2017 Senior Credit Facility [Member]                            
Debt Instrument, Unamortized Discount, Total                     $ 2,024  
Interest Paid, Including Capitalized Interest, Operating and Investing Activities, Total   590                        
Payments of Debt Issuance Costs   2,216                        
Repayments of Senior Debt, Total   171,750                        
Gain (Loss) on Extinguishment of Debt, Total   2,830                        
The 2017 Senior Credit Facility [Member] | Term A-1 Facility [Member]                            
Repayments of Long-term Debt, Total   112,500                        
The 2017 Senior Credit Facility [Member] | Term A-2 Facility [Member]                            
Repayments of Long-term Debt, Total   $ 59,250                        
6.25% Convertible Notes Due 2018 [Member]                            
Debt Instrument, Interest Rate, Stated Percentage     6.25%                      
Debt Instrument, Repurchase Amount     $ 10,358                      
Debt Instrument, Repurchased Face Amount     10,044                      
Debt Instrument, Repurchase Amount, Accrued Interest     314                      
Gain (Loss) on Repurchase of Debt Instrument     0                      
6.25% Convertible Notes Due 2018 Repurchased Utilizing Restricted Cash [Member]                            
Debt Instrument, Repurchase Amount     10,044                      
6.25% Convertible Notes Due 2018 Repurchased Utilizing Cash On Hand [Member]                            
Debt Instrument, Repurchase Amount     $ 314